A testing device for the tensile properties of textile fabrics

Abstract

This invention relates to the technical field of fabric tensile strength testing equipment, specifically a textile fabric tensile strength testing device, including a frame, a lifting structure, a drive assembly, a clamping structure, an electrically controlled limit structure, a mechanically controlled limit structure, and a locking structure. The lifting structure, electrically controlled limit structure, and mechanically controlled limit structure work together to form dual safety protection. The electrically controlled limit structure first achieves electrical power-off protection through signal triggering. If the electrical control fails, the mechanically controlled limit structure can forcibly brake through mechanical stops, effectively preventing equipment overtravel damage and sample scrapping, significantly improving the safety and reliability of the testing process. The locking structure facilitates synchronous and rapid adjustment of the test stroke and over-limit, eliminating the need for separate calibration, making operation convenient and efficient. The clamping structure facilitates rapid disassembly and assembly of the textile fabric and secure clamping, ensuring that the fabric does not slip or fall off under high tensile force, simplifying the disassembly and maintenance process, and effectively improving testing efficiency and data accuracy.

Description

Technical Field

[0001] This invention relates to the field of fabric tensile strength testing equipment, specifically a testing device for the tensile properties of textile fabrics. Background Technology

[0002] Textile fabric tensile property testing equipment is a specialized device used to determine the mechanical properties of textile fabrics, such as breaking strength and elongation, under tensile force. Its core function is to uniformly stretch fabric samples and simultaneously collect tensile force and displacement data to evaluate the mechanical properties of the fabric. It is widely used in textile production quality control and third-party testing institutions.

[0003] However, most existing testing equipment uses a single electrical limit protection and lacks mechanical redundancy protection. If the control system or sensor fails, it is very easy for the crossbeam or clamp to rise or fall beyond its range. This will not only cause irreversible damage to the mechanical parts of the equipment, but also directly lead to the scrapping of the test sample and increase the testing cost. Meanwhile, the test start position and overtravel protection position of the existing equipment are mostly fixed, which not only makes it difficult to quickly adapt to the stretching stroke requirements of fabrics under different specifications and test standards, but also makes the adjustment process cumbersome and prone to deviation, and makes it difficult to achieve synchronous linkage between limit protection and stroke control. Meanwhile, the fabric clamps on the equipment mostly use screw-driven clamping blocks to clamp the fabric, which not only makes the disassembly and maintenance process complicated, but also has a low coefficient of friction on the clamping surface. In high tensile force tests, the fabric is prone to slippage or falling off, resulting in distorted test data and affecting the accuracy and stability of the results. Summary of the Invention

[0004] To address the problems in the prior art, the present invention provides a device for testing the tensile properties of textile fabrics.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a textile fabric tensile performance testing device, including a frame, a drive component installed inside the frame, and a lifting structure connected to the drive component, wherein the lifting structure is provided with an over-limit protection component; The lifting structure includes a support member and a lifting member. The support member is used to install the lifting member and the fabric clamp. The lifting member is used to drive the fabric clamp to rise and fall. The over-limit protection component includes an electrically controlled limit structure, a mechanically controlled limit structure, and a locking structure. The support member is equipped with a first electrically controlled limit structure to prevent the lifting member from exceeding its operating stroke. The lifting member is equipped with a second mechanically controlled limit structure to provide protection when the electrically controlled limit structure fails. The mechanically controlled limit structure is connected to a locking structure for adjusting the over-travel limit point.

[0006] Specifically, the support includes column covers and a top beam. Column covers are fixedly connected to both sides of the frame, and a top beam is fixedly connected between the tops of the two column covers.

[0007] Specifically, the lifting component includes a lead screw, a bracket, an encoder, a crossbeam, a slider, and support columns. Two support columns are fixedly connected to both sides of the frame near the inside of the column cover. The top of each support column is fixedly connected to the top beam. A crossbeam is provided between the two pairs of support columns. A slider is fixedly connected to each crossbeam near the support column. The slider is slidably connected to the adjacent support column. Lead screws are rotatably connected to both sides of the frame near the center of the two support columns. The tops of both lead screws are rotatably connected to the top beam. The bottoms of both lead screws are connected to the drive assembly. A bracket is fixedly connected to the top beam. An encoder is fixedly connected to the bracket. One of the lead screws is fixedly connected to the encoder's shaft.

[0008] Specifically, the electronically controlled limit structure includes a driving component and a triggering component. The driving component includes a mounting block, a sliding rod, a top block, a first spring, an over-limit block, a triggering block, bolts, and a lever. Mounting blocks are fixedly connected to both the upper and lower ends of one of the column covers. A sliding rod is slidably connected between two mounting blocks. A top block is fixedly connected to the top of the sliding rod. A first spring is fixedly connected between the top block and the adjacent mounting block. Two over-limit blocks are fixedly connected to the middle of the sliding rod by two bolts. A triggering block is fixedly connected to the bottom of the sliding rod by another bolt.

[0009] Specifically, a lever is fixedly connected to one end of the crossbeam near the slide bar, and the lever abuts against the adjacent over-limit block.

[0010] Specifically, the triggering element includes a connecting frame, limit switches, contacts, springs, and a housing. One of the column covers has a connecting frame near the trigger block. The connecting frame is fixedly connected to the frame. Limit switches are fixedly connected to the connecting frame near the upper and lower ends of adjacent bolts. Contacts and springs are fixedly connected to the two limit switches near the bolts. The housing is fixedly connected to the outer side of the connecting frame.

[0011] Specifically, the machine-controlled limiting structure includes a blocking block, a connecting plate, a connecting ring, and a second spring. Two blocking blocks are slidably connected between the two support columns near the slide rod. A connecting plate is fixedly connected to the blocking block. Both the blocking block and the connecting plate are slidably connected to the adjacent column cover. A connecting ring is fixedly connected to the connecting plate near the slide rod. The connecting ring is slidably connected to the slide rod. A second spring is fixedly connected between the connecting ring and the adjacent over-limit block. The two connecting plates are symmetrically arranged.

[0012] Specifically, the locking structure includes a locking component and a tensioning component. The locking component includes a limiting pin, a third spring, and a slot. Two limiting pins are slidably connected on the blocking block. A third spring is fixedly connected between the limiting pin and the inner wall of the blocking block. Multiple slots are equidistantly provided on the two support columns near the blocking block. The outer end of the limiting pin engages with the adjacent slot.

[0013] Specifically, the tensioning member includes a drive rod and a pull rod. The drive rod is slidably connected to the blocking block near the middle of the two limiting pins. The pull rod is fixedly connected to the outer end of the drive rod. The end of the pull rod near the drive rod abuts against the blocking block. The cross-section of the drive rod is in the shape of a "mountain". Both limiting pins have inclined surfaces. The inner end of the drive rod slides in cooperation with the inclined surfaces on the two limiting pins.

[0014] Specifically, both the top beam and the crossbeam are equipped with clamping structures. Each clamping structure includes a base, and a base is fixedly connected to both the top beam and the crossbeam. A docking block is fixedly connected to the base via a pin, and a mounting bracket is fixedly connected to the docking block. Four guide rods are fixedly connected to the front of the mounting bracket, and a first clamping plate is fixedly connected between the four guide rods. A toothed block is slidably connected to the first clamping plate, and a knob is threadedly connected to the first clamping plate. The end of the knob is rotatably connected to an adjacent toothed block. A second clamping plate is slidably connected between the four guide rods, and another toothed block is fixedly connected to the front of the second clamping plate. A driving block is fixedly connected to the back of the second clamping plate, and the driving block is slidably connected to the mounting bracket. An inclined surface is provided on the driving block. A hydraulic rod is fixedly connected to the back side of the mounting bracket, and a pressure block is fixedly connected to the telescopic end of the hydraulic rod. The pressure block is slidably connected to the mounting bracket, and the pressure block is slidably engaged with the inclined surface on the driving block.

[0015] The beneficial effects of this invention are: (1) The textile fabric tensile performance testing equipment of the present invention has a lifting structure installed on the frame. The lifting structure is equipped with an electrical control limit structure and a mechanical control limit structure. The three are used together to facilitate the formation of double safety protection during the lifting of the crossbeam. The electrical control limit structure first realizes electrical power-off protection through signal triggering. If the electrical control fails, the mechanical control limit structure can force braking through mechanical stop, effectively avoiding equipment overtravel damage and sample scrapping, and greatly improving the safety and reliability of the testing process.

[0016] (2) The textile fabric tensile performance testing equipment of the present invention has a locking structure on the machine control limit structure. The locking structure facilitates the synchronous and rapid adjustment of the test stroke and the over-limit. During the adjustment, the trigger position of the electric control limit can be linked synchronously to adapt to the tensile stroke requirements of fabrics under different specifications and different test standards. There is no need for separate calibration, and the operation is convenient and efficient.

[0017] (3) The tensile strength testing equipment for textile fabrics described in this invention has a clamping structure installed on the lifting structure. The clamping structure facilitates the quick disassembly and assembly and stable clamping of textile fabrics. Through hydraulic drive and toothed anti-slip structure, it not only ensures that the fabric does not slip or fall off under high tensile force, but also simplifies the disassembly and maintenance process, effectively improving testing efficiency and data accuracy. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of a textile fabric tensile property testing device provided by the present invention; Figure 2 for Figure 1 The diagram shown is an enlarged view of the structure of part A. Figure 3 This is a schematic diagram of the connection structure between the hydraulic rod and the pressure block of the present invention; Figure 4 This is a schematic diagram of the connection structure between the knob and the toothed block of the present invention; Figure 5 This is a schematic diagram of the connection structure between the frame and the drive assembly of the present invention; Figure 6 This is a schematic diagram of the connection structure between the frame and the lead screw of the present invention; Figure 7 for Figure 6 The diagram shown is an enlarged view of the structure of section B. Figure 8 for Figure 6 The diagram shows an enlarged view of section C. Figure 9 This is a schematic diagram of the connection structure between the frame and the column cover of the present invention; Figure 10 for Figure 9 The diagram shown is an enlarged view of the structure of part D. Figure 11 for Figure 9 The diagram shown is an enlarged view of the structure of part E. Figure 12 This is a schematic diagram of the connection structure between the mounting block and the slide rod of the present invention; Figure 13 for Figure 12The diagram shows an enlarged view of the F-section structure.

[0020] In the diagram: 1. Frame; 2. Lifting structure; 201. Column cover; 202. Top beam; 203. Lead screw; 204. Bracket; 205. Encoder; 206. Crossbeam; 207. Slider; 208. Support column; 3. Drive assembly; 4. Clamping structure; 401. Base; 402. Connecting block; 403. Pin; 404. Mounting bracket; 405. Guide rod; 406. First clamping plate; 407. Tooth block; 408. Knob; 409. Second clamping plate; 410. Hydraulic rod; 411. Pressure block; 412. Drive block; 5. Electrically controlled limit structure 501. Mounting block; 502. Slide rod; 503. Top block; 504. First spring; 505. Over-limit block; 506. Trigger block; 507. Bolt; 508. Connecting frame; 509. Limit switch; 510. Contact; 511. Spring; 512. Housing; 513. Paddle; 6. Mechanically controlled limit structure; 601. Blocking block; 602. Connecting plate; 603. Connecting ring; 604. Second spring; 7. Locking structure; 701. Limit pin; 702. Third spring; 703. Drive rod; 704. Pull rod; 705. Slot. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0022] like Figure 1 , Figure 2 and Figures 5-13As shown, the textile fabric tensile property testing equipment of the present invention includes a frame 1, a drive assembly 3 installed inside the frame 1, and a lifting structure 2 connected to the drive assembly 3. The lifting structure 2 is equipped with an over-limit protection component. The lifting structure 2 includes a support member and a lifting member. The support member is used to install the lifting member and the fabric clamp. The lifting member is used to drive the fabric clamp to rise and fall. The over-limit protection component includes an electrically controlled limit structure 5, a mechanically controlled limit structure 6, and a locking structure 7. The support member is equipped with a first electrically controlled limit structure 5 to prevent the lifting member from exceeding its operating stroke. The lifting member is equipped with a second mechanically controlled limit structure 6 to provide protection when the electrically controlled limit structure 5 fails. The mechanically controlled limit structure 6 is connected to an adjustment point for the over-travel limit. The locking structure 7 includes a support component comprising a column cover 201 and a top beam 202. Column covers 201 are fixedly connected to both sides of the frame 1, and a top beam 202 is fixedly connected between the tops of the two column covers 201. The lifting component includes a lead screw 203, a bracket 204, an encoder 205, a crossbeam 206, a slider 207, and support columns 208. Two support columns 208 are fixedly connected to both sides of the frame 1 near the interior of the column covers 201. The tops of the support columns 208 are fixedly connected to the top beam 202. A crossbeam 206 is provided between the two pairs of support columns 208. Slider 207s are fixedly connected to the crossbeams 206 near the support columns 208, and the sliders 207 are slidably connected to the adjacent support columns 208. On both sides of the frame 1, near the center of the two support columns 208, lead screws 203 are rotatably connected. The tops of the two lead screws 203 are rotatably connected to the top beam 202, and the bottoms of the two lead screws 203 are connected to the drive assembly 3. The drive assembly 3 consists of a servo motor, a driving synchronous pulley, a driven synchronous pulley, and a synchronous belt. The servo motor drives the driving synchronous pulley, which in turn drives the driven synchronous pulleys at the bottom of the lead screws 203 on both sides to rotate synchronously, so that the two lead screws 203 rotate at the same speed and in the same direction, thereby smoothly driving the crossbeam 206 to rise and fall synchronously on both sides, avoiding uneven load and swaying. A bracket 204 is fixedly connected to the top beam 202, and an encoder 205 is fixedly connected to the bracket 204. One of the lead screws 203 is connected to the encoder 205. The shafts of the 05 are fixedly connected. The encoder 205 converts the rotation angle of the lead screw 203 into a pulse electrical signal through photoelectric conversion. The control system counts the number of pulses and combines them with the lead of the lead screw 203 to accurately calculate the actual linear displacement and moving speed of the crossbeam 206. The data is then fed back to the servo system in real time to form a closed-loop control, correct the motor output, and ensure accurate detection of tensile displacement. The two lead screws 203 rotate synchronously to drive the crossbeam 206 on both sides, so that the crossbeam 206 is subjected to balanced force during the lifting process. This avoids the problem of one-sided load, jamming or shaking that is easy to occur when the crossbeam 206 is driven by a single lead screw 203, and ensures that the crossbeam 206 always maintains horizontal and stable operation, thereby improving the stability and displacement detection accuracy of the fabric stretching process.This equipment allows adjustment of the clamp's travel stroke according to the different types of textile fabrics being tested. This can be achieved by adjusting the upper and lower limits of the crossbeam 206.

[0023] Specifically, such as Figures 6-8 and Figures 10-12 As shown, the electrically controlled limit structure 5 includes a driving component and a triggering component. The driving component includes a mounting block 501, a sliding rod 502, a top block 503, a first spring 504, an over-limit block 505, a triggering block 506, a bolt 507, and a lever 513. Mounting blocks 501 are fixedly connected to both the upper and lower ends of one of the column covers 201. A sliding rod 502 is slidably connected between the two mounting blocks 501. A top block 503 is fixedly connected to the top of the sliding rod 502. A first spring 504 is fixedly connected between the top block 503 and the adjacent mounting block 501. 4. The first spring 504 facilitates the automatic reset of the slide rod 502. Two over-limit blocks 505 are fixedly connected to the slide rod 502 near its center by two bolts 507. A trigger block 506 is fixedly connected to the bottom of the slide rod 502 by another bolt 507. A lever 513 is fixedly connected to one end of the crossbeam 206 near the slide rod 502. The lever 513 abuts against the adjacent over-limit blocks 505. During the stretching process, the crossbeam 206 drives the lever 513 to rise and fall synchronously. When the crossbeam 206 approaches the set upper or lower limit, the lever... 513 abuts against the over-limit block 505 and drives the slide rod 502 to slide along the mounting block 501. The triggering element includes a connecting frame 508, a limit switch 509, a contact 510, a spring 511, and a housing 512. One of the column covers 201 has a connecting frame 508 near the trigger block 506. The connecting frame 508 is fixedly connected to the frame 1. Limit switches 509 are fixedly connected to the connecting frame 508 at both ends near the adjacent bolts 507. The sides of the two limit switches 509 near the bolts 507 are fixed. The circuit is connected to a contact 510 and a spring 511. The slide rod 502 drives the trigger block 506 to move, causing the bolt 507 on the trigger block 506 to press the spring 511 and contact the contact 510, triggering the limit switch 509 to send a power-off signal, stopping the equipment from running and preventing the crossbeam 206 from overtraveling. The connecting frame 508 is used to fix the limit switch 509. The housing 512 protects the limit switch 509, contact 510 and spring 511 from dust and foreign objects affecting their operation. The housing 512 is fixedly connected to the outside of the connecting frame 508.

[0024] Specifically, such as Figure 7 and Figures 10-13As shown, the mechanically controlled limiting structure 6 includes a blocking block 601, a connecting plate 602, a connecting ring 603, and a second spring 604. Two blocking blocks 601 are slidably connected between the two support columns 208 near the slide rod 502. If the electronically controlled limiting component fails, the crossbeam 206 directly abuts against the blocking block 601, and the mechanical stop forces the limiting, protecting the equipment and the sample. The connecting plate 602 is fixedly connected to the blocking block 601. Both the blocking block 601 and the connecting plate 602 are slidably connected to the adjacent column cover 201. The connecting ring 603 is fixedly connected to the connecting plate 602 near the slide rod 502. The connecting ring 603 is slidably connected to the slide rod 502. The second spring 604 is fixedly connected between the connecting ring 603 and the adjacent over-limit block 505. The connecting ring 603 moves synchronously with the over-limit block 505 through the second spring 604. The two connecting plates 602 are symmetrically arranged.

[0025] Specifically, such as Figures 5-7 and Figures 11-13 As shown, the locking structure 7 includes a locking component and a tensioning component. The locking component includes a limiting pin 701, a third spring 702, and a slot 705. Two limiting pins 701 are slidably connected to the blocking block 601. A third spring 702 is fixedly connected between the limiting pins 701 and the inner wall of the blocking block 601. Multiple slots 705 are equidistantly provided on the two support columns 208 near the blocking block 601. The outer ends of the limiting pins 701 engage with adjacent slots 705. The tensioning component includes a drive rod 703 and a pull rod 704. A drive rod 703 is slidably connected to the blocking block 601 near the middle of the two limiting pins 701. A pull rod 704 is fixedly connected to the outer end of the drive rod 703. The rod 704 has one end near the drive rod 703 that abuts against the blocking block 601. The drive rod 703 has a "mountain" shaped cross-section. Both limit pins 701 have inclined surfaces. The inner end of the drive rod 703 slides against the inclined surfaces of the two limit pins 701. Pulling the rod 704 outward can move the drive rod 703. The drive rod 703 pushes the limit pins 701 to retract and compress the third spring 702 through the inclined surfaces, thus disengaging from the slot 705 and unlocking. Moving the blocking block 601 up and down can adjust the limit position. After adjustment, the rod 704 is released, and the limit pins 701 reset and lock into the slot 705 under the action of the third spring 702 to complete the locking.

[0026] Specifically, such as Figures 1-4 , Figure 6 , Figure 9 and Figure 12As shown, both the top beam 202 and the crossbeam 206 are equipped with clamping structures 4. Each clamping structure 4 includes a base 401, which is fixedly connected to both the top beam 202 and the crossbeam 206. A connecting block 402 is fixedly connected to the base 401 via a pin 403, facilitating quick disassembly and maintenance of the clamp. A mounting bracket 404 is fixedly connected to the connecting block 402. Four guide rods 405 are fixedly connected to the front of the mounting bracket 404. A first clamping plate 406 is fixedly connected between the four guide rods 405. A toothed block 407 is slidably connected to the first clamping plate 406. A knob 408 is threadedly connected to the first clamping plate 406. The end of the knob 408 is rotatably connected to the adjacent toothed block 407. Rotating the knob 408 adjusts the extension length of the toothed block 407 to suit the fabric thickness. A second clamping plate 409 is slidably connected between the four guide rods 405. Another toothed block 407 is fixedly connected to the front to improve clamping stability. A drive block 412 is fixedly connected to the back of the second clamping plate 409. The drive block 412 is slidably connected to the mounting frame 404. An inclined surface is provided on the drive block 412. A hydraulic rod 410 is fixedly connected to the back side of the mounting frame 404. A pressure block 411 is fixedly connected to the telescopic end of the hydraulic rod 410. The pressure block 411 is slidably connected to the mounting frame 404. The pressure block 411 and the inclined surface on the drive block 412 are slidably engaged. The hydraulic rod 410 pushes the pressure block 411 down. The inclined surface drives the drive block 412 to move the second clamping plate 409 toward the first clamping plate 406 to clamp the fabric. After the test is completed, the hydraulic rod 410 resets and pushes the second clamping plate 409 to release the fabric. The first spring 504 drives the slide rod 502, the over-limit block 505, and the trigger block 506 to reset, and the next set of tests can be performed.

[0027] In use, the operating stroke of the clamp can be adjusted according to the different types of textile fabrics being tested. This can be achieved by adjusting the upper and lower limits of the crossbeam 206. Simply pull the lever 704 outward to move the "mountain"-shaped drive rod 703. The drive rod 703 slides with the inclined surface on the limit pin 701, pushing the two limit pins 701 to retract inward simultaneously, compressing the third spring 702 and disengaging it from the slot 705 on the support column 208, thus unlocking the position of the blocking block 601. Then, loosen the bolt 507 on the overlimit block 505, and then move the blocking block 601 up and down. The blocking block 601 drives the connecting ring through the connecting plate 602. 603 slides along the slide bar 502, and the connecting ring 603 drives the over-limit block 505 to move up and down synchronously through the second spring 604. At this time, the position of the blocking block 601 and the over-limit block 505 on the slide bar 502 is quickly adjusted, thereby adjusting the upper and lower limits of the crossbeam 206. After adjusting to the required test stroke, the bolt 507 on the over-limit block 505 is tightened again, and the pull rod 704 is loosened. The limit pin 701 is reset under the elastic force of the third spring 702 and is inserted into the corresponding slot 705 of the support column 208, thus locking the position of the blocking block 601 and the over-limit block 505 and fixing the upper and lower limits of the crossbeam 206. Next, the fabric needs to be clamped. Simply fix both ends of the fabric to be tested into the clamps on the top beam 202 and the cross beam 206, respectively. First, insert one end of the fabric between the first clamping plate 406 and the second clamping plate 409 on the top beam 202. Adjust the extension length of the toothed block 407 on the first clamping plate 406 according to the fabric thickness by turning the knob 408. The toothed block 407 on the first clamping plate 406 and the second clamping plate 409 improves the clamping firmness. Then, activate the hydraulic rod 41 on the back of the mounting frame 404. 0. The telescopic end of the hydraulic rod 410 pushes the pressure block 411 to slide downward along the inner wall of the mounting frame 404. The pressure block 411 slides with the inclined surface on the drive block 412, pushing the drive block 412 to drive the second clamping plate 409 to move along the four guide rods 405 towards the first clamping plate 406, pressing and fixing one end of the fabric. Repeat the above operation to fix the other end of the fabric in the clamp on the crossbeam 206. The base 401 provides a foundation for fixing the clamp. The connecting block 402 is connected to the base 401 through the pin 403, which facilitates the quick disassembly and maintenance of the clamp. After the textile fabric is clamped, the drive assembly 3 (composed of a servo motor, an active synchronous pulley, a driven synchronous pulley, and a synchronous belt; the servo motor drives the active synchronous pulley, which in turn drives the driven synchronous pulleys at the bottom of the lead screws 203 on both sides to rotate synchronously, achieving the same speed and direction of rotation for the two lead screws 203, thus smoothly driving the crossbeam 206 to rise and fall synchronously on both sides, avoiding uneven load and swaying) drives the two lead screws 203 on the frame 1 to rotate synchronously. The lead screws 203 drive the crossbeam 206 to rise and fall smoothly along the support column 208 via the slider 207. The encoder 205 fixed to the bracket 204 on the top beam 202 is fixedly connected to one of the lead screws 203. The encoder 205... The photoelectric conversion principle converts the rotation angle of the lead screw 203 into a pulse electrical signal. The control system counts the number of pulses and combines them with the lead of the lead screw 203 to accurately calculate the actual linear displacement and moving speed of the crossbeam 206. This data is then fed back to the servo system in real time to form a closed-loop control, correcting the motor output and ensuring accurate detection of tensile displacement. The two lead screws 203 rotate synchronously, providing dual-sided synchronous drive for the crossbeam 206. This ensures that the crossbeam 206 is subjected to balanced force during lifting and lowering, avoiding the problems of unilateral load, jamming, or swaying that easily occur when the crossbeam 206 is driven by a single lead screw 203. This ensures that the crossbeam 206 always maintains horizontal and stable operation, thereby improving the stability and displacement detection accuracy of the fabric stretching process. During the stretching process, the electronically controlled limit assembly operates accordingly. At this time, the crossbeam 206 drives the lever 513 to rise and fall synchronously. When the crossbeam 206 approaches the set upper or lower limit, the lever 513 abuts against the over-limit block 505 on the slide rod 502. Since the over-limit block 505 is fixed to the slide rod 502 by bolts 507, it will cause the slide rod 502 to slide along the two mounting blocks 501 on the outer wall of the column cover 201. The top block 503 at the top of the slide rod 502 compresses or stretches the first spring 504. The first spring 504 is designed to facilitate the automatic reset of the slide rod 502. Simultaneously, the trigger block 506 at the bottom of the slide bar 502 moves toward the position of the limit switch 509, causing another bolt 507 on the trigger block 506 to press the spring 511 on the limit switch 509, causing the spring 511 to contact the contact 510, triggering the limit switch 509 to send a power-off signal, stopping the equipment from running, and preventing the crossbeam 206 from exceeding the set travel. The connecting frame 508 is used to fix the limit switch 509, and the outer shell 512 protects the limit switch 509, the contact 510 and the spring 511, preventing dust and foreign objects from affecting its operation. If the electronically controlled limit component fails, the mechanically controlled limit component is activated as a second overtravel protection. The crossbeam 206 continues to rise and fall and directly contacts the blocking block 601 in the mechanically controlled limit component. Through the mechanical stopping action of the blocking block 601, the crossbeam 206 is forcibly stopped from continuing to move, thus completely avoiding overtravel impact caused by servo system failure and protecting the safety of the equipment and the sample. After the test is completed, the equipment is turned off, the hydraulic rod 410 is reset, the pressure block 411 is disengaged from the drive block 412, and the second clamping plate 409 is pushed with a finger to reset it under the action of thrust and fabric tension, releasing the fabric. The above operation can then be repeated to test the tensile performance of the next set of fabrics. At the same time, the first spring 504 drives the slide rod 502, the top block 503, the over-limit block 505 and the trigger block 506 to reset, preparing for the next test.

[0028] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A textile fabric tensile strength testing device, comprising a frame (1), a drive assembly (3) installed inside the frame (1), and a lifting structure (2) connected to the drive assembly (3), characterized in that: The lifting structure (2) is equipped with an over-limit protection component; The lifting structure (2) includes a support and a lifting component. The support is used to install the lifting component and the fabric clamp. The lifting component is used to drive the fabric clamp to rise and fall. The over-limit protection component includes an electronically controlled limit structure (5), a mechanically controlled limit structure (6), and a locking structure (7). The support is equipped with a first electronically controlled limit structure (5) to prevent the lifting component from exceeding its operating stroke. The lifting component is equipped with a second mechanically controlled limit structure (6) to provide protection when the electronically controlled limit structure (5) fails. The mechanically controlled limit structure (6) is connected to a locking structure (7) for adjusting the over-limit point.

2. The textile fabric tensile property testing equipment according to claim 1, characterized in that: The support includes a column cover (201) and a top beam (202). The column covers (201) are fixedly connected to both sides of the frame (1), and the top beam (202) is fixedly connected between the tops of the two column covers (201).

3. The textile fabric tensile property testing equipment according to claim 2, characterized in that: The lifting component includes a lead screw (203), a bracket (204), an encoder (205), a crossbeam (206), a slider (207), and support columns (208). Two support columns (208) are fixedly connected to both sides of the frame (1) near the interior of the column cover (201). The top of each support column (208) is fixedly connected to the top beam (202). A crossbeam (206) is provided between the two pairs of support columns (208). A slider (207) is fixedly connected to each crossbeam (206) near the support column (208). 7) Sliding connection between the frame (1) and the adjacent support column (208). Both sides of the frame (1) are rotatably connected to the center of the two support columns (208). The top of the two lead screws (203) are rotatably connected to the top beam (202). The bottom of the two lead screws (203) are connected to the drive assembly (3). A bracket (204) is fixedly connected to the top beam (202). An encoder (205) is fixedly connected to the bracket (204). One of the lead screws (203) is fixedly connected to the shaft of the encoder (205).

4. The textile fabric tensile property testing equipment according to claim 2, characterized in that: The electrically controlled limit structure (5) includes a driving component and a trigger component. The driving component includes a mounting block (501), a sliding rod (502), a top block (503), a first spring (504), an over-limit block (505), a trigger block (506), a bolt (507), and a lever (513). The upper and lower ends of one of the column covers (201) are fixedly connected to the mounting blocks (501). The two mounting blocks (501) are slidably connected to the sliding rod (502). The top of the sliding rod (502) is fixedly connected to the top block (503). The top block (503) is fixedly connected to the adjacent mounting block (501) with the first spring (504). Two over-limit blocks (505) are fixedly connected to the middle position of the sliding rod (502) by two bolts (507). The bottom of the sliding rod (502) is fixedly connected to the trigger block (506) by another bolt (507).

5. The textile fabric tensile property testing equipment according to claim 3, characterized in that: A lever (513) is fixedly connected to one end of the crossbeam (206) near the slide bar (502), and the lever (513) abuts against the adjacent over-limit block (505).

6. The textile fabric tensile property testing equipment according to claim 4, characterized in that: The triggering element includes a connecting frame (508), a limit switch (509), a contact (510), a spring (511), and a housing (512). A connecting frame (508) is provided on one of the column covers (201) near the trigger block (506). The connecting frame (508) is fixedly connected to the frame (1). Limit switches (509) are fixedly connected to both ends of the connecting frame (508) near the adjacent bolts (507). Contacts (510) and springs (511) are fixedly connected to the side of the two limit switches (509) near the bolts (507). A housing (512) is fixedly connected to the outside of the connecting frame (508).

7. The textile fabric tensile property testing equipment according to claim 3, characterized in that: The machine-controlled limiting structure (6) includes a blocking block (601), a connecting plate (602), a connecting ring (603), and a second spring (604). Two blocking blocks (601) are slidably connected between the two support columns (208) near the slide rod (502). A connecting plate (602) is fixedly connected to the blocking block (601). Both the blocking block (601) and the connecting plate (602) are slidably connected to the adjacent column cover (201). A connecting ring (603) is fixedly connected to the connecting plate (602) near the slide rod (502). The connecting ring (603) is slidably connected to the slide rod (502). A second spring (604) is fixedly connected between the connecting ring (603) and the adjacent over-limit block (505). The two connecting plates (602) are symmetrically arranged.

8. The textile fabric tensile property testing equipment according to claim 7, characterized in that: The locking structure (7) includes a locking component and a tensioning component. The locking component includes a limiting pin (701), a third spring (702), and a slot (705). Two limiting pins (701) are slidably connected on the blocking block (601). A third spring (702) is fixedly connected between the limiting pin (701) and the inner wall of the blocking block (601). Multiple slots (705) are equidistantly provided on the two support columns (208) near the blocking block (601). The outer end of the limiting pin (701) is engaged with the adjacent slot (705).

9. The textile fabric tensile property testing equipment according to claim 8, characterized in that: The tensioning member includes a drive rod (703) and a pull rod (704). The drive rod (703) is slidably connected to the blocking block (601) near the middle of the two limiting pins (701). The outer end of the drive rod (703) is fixedly connected to the pull rod (704). One end of the pull rod (704) near the drive rod (703) abuts against the blocking block (601). The cross-section of the drive rod (703) is in the shape of a "mountain". Both limiting pins (701) have inclined surfaces. The inner end of the drive rod (703) slides with the inclined surfaces on the two limiting pins (701).

10. The textile fabric tensile property testing equipment according to claim 3, characterized in that: Both the top beam (202) and the cross beam (206) are provided with clamping structures (4). The clamping structure (4) includes a base (401). The top beam (202) and the cross beam (206) are both fixedly connected to the base (401). The base (401) is fixedly connected to the docking block (402) by a pin (403). The docking block (402) is fixedly connected to the mounting bracket (404). The front of the mounting bracket (404) is fixedly connected to four guide rods (405). The four guide rods (405) are fixedly connected to a first clamping plate (406). The first clamping plate (406) is slidably connected to a toothed block (407). The first clamping plate (406) is threadedly connected to a knob (408). The knob (408) is... The end is rotatably connected to the adjacent toothed block (407), and the four guide rods (405) are slidably connected to a second clamping plate (409). Another toothed block (407) is fixedly connected to the front of the second clamping plate (409), and a driving block (412) is fixedly connected to the back of the second clamping plate (409). The driving block (412) is slidably connected to the mounting frame (404). An inclined surface is provided on the driving block (412). A hydraulic rod (410) is fixedly connected to the back of the mounting frame (404). A pressure block (411) is fixedly connected to the telescopic end of the hydraulic rod (410). The pressure block (411) is slidably connected to the mounting frame (404), and the pressure block (411) is slidably engaged with the inclined surface on the driving block (412).

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